import java.util.concurrent.BrokenBarrierException;
import java.util.concurrent.CyclicBarrier;
import java.util.concurrent.Semaphore;

public class CyclicBarrierDemo {


    public static void main(String[] args) {


        CyclicBarrier cyclicBarrier = new CyclicBarrier(7, () -> {
            System.out.println("******* 召唤神龙");
        });

        for (int i = 1; i <= 7; i++) {
            final int tempInt = i;
            new Thread(() -> {
                System.out.println(Thread.currentThread().getName() + "\t 收集到第" + tempInt + "颗龙珠");
                try {
                    cyclicBarrier.await();
                } catch (InterruptedException e) {
                    e.printStackTrace();
                } catch (BrokenBarrierException e) {
                    e.printStackTrace();
                }
            }, String.valueOf(i)).start();
        }

    }
}
